<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			#parent{
				height: 200px;
				width: 200px;
				border: 30px gray inset;
				border-radius: 20px;
				display: flex;
				justify-content: flex-end;
				align-items: flex-end;
			}
			
			.children{
				margin: 10px;
				width: 50px;
				height: 50px;
				background-color: black;
				border-radius: 50%;
			}
		</style>
	</head>
	<body>
		<div id="parent">
			<div class="children"></div>
		</div>
	</body>
</html>
